- What is the smallest prime number?
- What is the HCF of two Coprime numbers?
- Is 1 relatively prime to any number?
- What is Coprime number?
- What are the co prime numbers between 1 to 100?
- Is 25 a Coprime number?
- Are 11 and 13 twin primes?
- Is 31 and 59 are Coprime?
- Why 1 is not a prime number?
- Is 216 and 215 are Coprime?
- What is the co prime number of 32?
- Is 18 and 35 a Coprime number?
- Are 2 and 3 Coprime numbers?
- Is 28 a perfect number?
- Which of the following is a pair of Coprime 14 35?

## What is the smallest prime number?

The smallest prime numbers are 2, 3, 5, 7, 11, 13, 17, 19 and 23.

The number 2 is the only even prime number.

The number 7 has only two factors: 1 and itself..

## What is the HCF of two Coprime numbers?

The HCF of two coprime numbers is always 1 . For example: 5 and 9 are coprime numbers and hence, HCF (5,9)=1 ( 5 , 9 ) = 1 .

## Is 1 relatively prime to any number?

Two numbers are relatively prime if they have no prime factors in common. … Therefore, 1 has no prime factors. Since 1 has no prime factors, it obviously cannot have prime factors in common with any other number. So 1 is relatively prime with any other number, including 2.

## What is Coprime number?

In number theory, two integers a and b are said to be relatively prime, mutually prime, or coprime (also written co-prime) if the only positive integer (factor) that divides both of them is 1. Consequently, any prime number that divides one does not divide the other.

## What are the co prime numbers between 1 to 100?

So there are 10 integers in the set of integers from 1 to 100 that are ”perfect” co-primes, in that they do not have common factors with any other integer in the range 1–100 (except 1). The “perfect” co-primes are: 53, 59, 61, 67, 71, 73, 79, 83, 89 and 97.

## Is 25 a Coprime number?

Two integers a and b are said to be coprimes if they have no common factors other than 1 and the number itself. … 18 and 25 have no common factor other than 1. =>HCF(18,25)=1. Yes, (18,25) are coprime numbers.

## Are 11 and 13 twin primes?

The first fifteen pairs of twin primes are as follows: (3, 5), (5, 7), (11, 13), (17, 19), (29, 31), (41, 43), (59, 61), (71, 73), (101, 103), (107, 109), (137, 139), … Also check: Co-Prime Numbers.

## Is 31 and 59 are Coprime?

Answer: Yes, 31,59 are co-prime numbers.

## Why 1 is not a prime number?

Proof: The definition of a prime number is a positive integer that has exactly two positive divisors. However, 1 only has one positive divisor (1 itself), so it is not prime.

## Is 216 and 215 are Coprime?

Which of the following numbers are co-prime: (a) 18 and 35 (b) 15 and 37 (c) 30 and 415 (d) 17 and 168 (e) 216 and 215 (f) 81 and 16. Answer: … Since both have only one common factor, i.e., 1, therefore, they are co-prime numbers.

## What is the co prime number of 32?

(4) Factors of 18 and 35 are 18=2×3×3 and 35=5×7 , as there is no common factor, they too are coprime numbers. However, in case of (1) factors of 32 and 24 are 32=2×2×2×2×2 and 24=2×2×2×3 , and common factors are 2×2×2=8 .

## Is 18 and 35 a Coprime number?

Factors of 18 are 1, 2, 3, 6, 9 and 18. Factors of 35 are 1, 5, 7 and 35. Therefore, 1 is the only common factor of 18 and 35. It means that 18 and 35 are co-prime.

## Are 2 and 3 Coprime numbers?

For example, 2 and 3 are two prime numbers. Factors of 2 are 1, 2, and factors of 3 are 1, 3. The only common factor is 1 and hence is co-prime. Any two successive numbers/ integers are always co-prime: Take any consecutive numbers such as 2, 3, or 3, 4 or 5, 6, and so on; they have 1 as their HCF.

## Is 28 a perfect number?

Perfect number, a positive integer that is equal to the sum of its proper divisors. The smallest perfect number is 6, which is the sum of 1, 2, and 3. Other perfect numbers are 28, 496, and 8,128.

## Which of the following is a pair of Coprime 14 35?

If two numbers are co-prime then the HCF of two numbers must be 1. In (14, 35), HCF of 14 and 35 is 7. In (18, 25), HCF of 18 and 25 is 1. In (31, 93), HCF of 31 and 93 is 31.